body{
    background‐color: #eee;
}
#img1{
    transition:All 0.6s ease‐in‐out;
    ‐webkit‐transition:All 0.6s ease‐in‐out;
    ‐moz‐transition:All 0.6s ease‐in‐out;
    ‐o‐transition:All 0.6s ease‐in‐out;
    ‐ms‐transition:All 0.6s ease‐in‐out;
}
#img1:hover {
    transform: rotate(360deg);
    ‐webkit‐transform: rotate(360deg);
    ‐moz‐transform: rotate(360deg);
    ‐o‐transform: rotate(360deg);
    ‐ms‐transform: rotate(360deg);
}